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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (3): 035602.doi: 10.1088/2058-6272/aa9fe6

• Fusion Engineering • Previous Articles    

Measurement of the surface morphology of plasma facing components on the EAST tokamak by a laser speckle interferometry approach

Hongbei WANG (王宏北)1, Xiaoqian CUI (崔晓倩)1, Yuanbo LI (李元博)1 , Mengge ZHAO (赵梦鸽)1, Shuhua LI (李树华)1, Guangnan LUO (罗广南)2 and Hongbin DING (丁洪斌)1   

  1. 1 School of Physics and Optical Electronic Technology, Dalian University of Technology, Dalian 116024, People’s Republic of China 2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
  • Received:2017-11-16 Published:2017-12-07
  • Supported by:

    This work was supported by the National Magnetic Confinement Fusion Science Program of China (No. 2013GB109005), National Natural Science Foundation of China (Nos. 11175035, 11475039) and Chinesisch-Deutsches Forschungs project (GZ768).

Abstract:

The laser speckle interferometry approach provides the possibility of an in situ optical non-contacted measurement for the surface morphology of plasma facing components (PFCs), and the reconstruction image of the PFC surface morphology is computed by a numerical model based on a phase unwrapping algorithm. A remote speckle interferometry measurement at a distance of three meters for real divertor tiles retired from EAST was carried out in the laboratory to simulate a real detection condition on EAST. The preliminary surface morphology of the divertor tiles was well reproduced by the reconstructed geometric image. The feasibility and reliability of this approach for the real-time measurement of PFCs have been demonstrated.

Key words: plasma facing components, laser speckle interferometry, morphology measurement